1. Properties of strains of Escherichia coli K12 carrying mutant lex-1 and uvrA6 alleles

   • David W. Mount
   • Candace Kosel

   OriginalPaper Pages: 291 - 299

2. On the nature of β-galactosidase synthesized by the DNA-directed cell-free system

   • D. A. Chambers
   • J. L. Manley

   OriginalPaper Pages: 301 - 308

3. Molecular studies on the 5S RNA genes of Drosophila melanogaster

   • Carroll E. Nix

   OriginalPaper Pages: 309 - 318

4. Mutants d'Escherichia coli K 12 affectés pour leur croissance sur méthyl-β-D-glucuronide: Localisation du gène de structure de la β-D-glucuronidase (uid A)

   • Georges Novel
   • Madeleine Novel

   OriginalPaper Pages: 319 - 335

5. Genetic analysis of mutants of Salmonella typhimurium deficient in formate dehydrogenase activity

   • M. C. Pascal
   • F. Casse
   • M. Lepelletier

   OriginalPaper Pages: 337 - 340

6. Methionine and vitamin B₁₂ repression and precursor induction in the regulation of homocysteine methylation in Salmonella typhimurium

   • Julie M. Whitehouse
   • D. A. Smith

   OriginalPaper Pages: 341 - 353

7. Indirect ultraviolet induction and curing in E. coli cells lysogenic for bacteriophage λ

   • Robert M. Benbow
   • Raymond Devoret
   • Paul Howard-Flanders

   OriginalPaper Pages: 355 - 368

8. Mutations arising during transformation in the blue-green alga Anacystis nidulans

   • M. Herdman

   OriginalPaper Pages: 369 - 378

9. The genetic control of fumarate hydratase (fumarase) in Drosophila melanogaster

   • K. Madhavan
   • H. Ursprung

   Short Communication Pages: 379 - 380